ISO 29463-1:2024

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ISO 29463-1:2024, titled "High efficiency filters and filter media for removing particles in air — Part 1: Classification, performance, testing and marking," establishes a comprehensive framework for classifying and evaluating high-efficiency particulate air (HEPA) and ultra-low penetration air (ULPA) filters. This standard is part of the ISO 29463 series, which aligns with the European standard EN 1822, maintaining the filter designations EPA (Efficient Particulate Air), HEPA, and ULPA. It introduces a classification system comprising 13 filter classes, ranging from ISO 15 E to ISO 75 U, based on the filter's efficiency in removing airborne particles.